Fe₃O₄/HKUST-1 magnetic copper based metal-organic frameworks (MOF) were synthesized by a simple and facile method and applied as an effective and recyclable adsorbent for the adsorptive removal of two widely used ciprofloxacin (CIP) and norfloxacin (NOR) fluoroquinolone antibiotics (FQAs) from aqueous solutions. Fe₃O₄/HKUST-1 was thoroughly characterized, and the major influence factors including solution pH, adsorbent amount and salt concentration were investigated. Compared to the reported adsorbents, Fe₃O₄/HKUST-1 has a very high adsorption rate, and it is found that CIP and NOR could be removed within 30 min. Moreover, the maximum adsorption capacities of the magnetic composites toward CIP and NOR reached as high as 538 mg g⁻¹ and 513 mg g⁻¹, respectively, much higher than those of most of the reported adsorbents for these two FQAs. The saturation magnetization value of Fe₃O₄/HKUST-1 was 44 emu g⁻¹, which was sufficient for the separation of the Fe₃O₄/HKUST-1adsorbent from the aqueous solution by the application of an external magnetic field. Additionally, this magnetic material showed a good reusability with the adsorption capability decreasing only slightly after reuse for ten cycles. These results indicated that the magnetic composites Fe₃O₄/HKUST-1 may be a promising adsorbent in the decontamination of FQAs from wastewater due to its high adsorption capability, fast kinetics, easy separation from water, and excellent recyclability. The adsorption mechanism was proposed based on the effects of pH on adsorption and on the zeta potential of the adsorbent. For the adsorption of CIP and NOR by Fe₃O₄/HKUST-1, both electrostatic and π-π interactions may be important.

Fe ₃ O ₄ / HKUST-1磁性铜基金属有机骨架（MOF）的合成方法简便易行，可作为有效可回收的吸附剂用于吸附去除两种广泛使用的环丙沙星（CIP）和诺氟沙星（NOR） ）水溶液中的氟喹诺酮类抗生素（FQA）。全面表征了Fe ₃ O ₄ / HKUST-1，研究了溶液pH，吸附量和盐浓度等主要影响因素。与报道的吸附剂相比，Fe ₃ O ₄/ HKUST-1具有很高的吸附速率，并且发现CIP和NOR可以在30分钟内去除。此外，磁性复合材料对CIP和NOR的最大吸附容量分别达到538 mg g ^-1和513 mg g ^-1，远高于大多数报道的两种FQA吸附剂的吸附容量。Fe ₃ O ₄ / HKUST-1的饱和磁化强度值为44 emu g ^-1，足以分离Fe ₃ O _4。/ HKUST-1吸附剂通过施加外部磁场从水溶液中提取。另外，该磁性材料显示出良好的可重复使用性，其吸附能力在重复使用十个循环后仅稍有下降。这些结果表明，磁性复合材料Fe ₃ O ₄ / HKUST-1具有很高的吸附能力，快速的动力学，与水的易分离性和优异的可回收性，在废水中对FQA的去污中可能是一种有前途的吸附剂。根据pH对吸附的影响以及吸附剂的ζ电位，提出了吸附机理。对于Fe ₃ O ₄ / HKUST-1吸附CIP和NOR ，静电和π-π相互作用都可能很重要。